Australopithecus

2. Lake Turkana, in northern Kenya, is now a desert, but in 4 Myr
BP, it was covered by ancient Lake Lonyumum, and in the lush forests
surrounding the rivers feeding the lake lived some of
mankind's important hominid ancestors, including
Australopithecus anamensis.

3. From the Gona River artifact assemblage, Afar, Ethopia. This
core is part of a collection of flakes, flake fragments, and cores
which are dated to 2.60-2.52 myr BP. The world's oldest
known tools (Rutgers University).